Improved fruit-jar



j UNITED STATES ROBERT HEMINGRAY,

PATENT OFFICE.

OF CINCINNATI, OHIO.

IMPROVED FRUIT-JAR.

Specification forming part of Letters Patent No. 48,399, dated June/27, 1865.

To all lwhom it may concern:

Beit known that I, ROBERT HEMINGEAY, of Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement in Glass Fruit-J ars g and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings and letters of reference marked thereon, the same forming part of this specification.

My invention relates to that class ot' jars in which the top or cover is held in place by a clamp extending across the top and down upon two opposite sides of the neck, and then turning inward, so as to form a projection or catch, one upon each side, which is adapted to a spiral projection or ledge formed upon the neck ofthe jar, the arrangement being such that by rotating theclamp itoperates like the nut of a screwbolt to compress and retain the cap upon the mouth of thejar. l

My invention relates particularly to the form ot' the spiral projection upon the neck of the ar. It has been 'common in making jars of this description to make thespiral projection around 'the neck of the jar in the form of a bead. This does not in all cases form full, so as to leave fair shoulders for the projections on the clamp; but the greatest objection to this construction is its liability to crumble or break oft when eX- posed to the strain Which itis necessary to eniploy with the clamp.

In my improved jar the projection which forms the shoulder is set out from the circle of l the neck the proper distance for a shoulder,

and then the outline is gradually contracted' all the Way'to the mouth of the jar.

In the accompanying drawings, Figure l is a vertical section of in y improved jar, and Fig. 2 is an elevation. A is the body of thejar; B, the neck; a, the cap; b, a thin gasket.l

C is the clamp, made of any suitable thin metal. The clamp is made ivitha small circular hole in the center, and a small circular pin,

time the strength ofthe parts Will be preserved. j The direction of the shoulders around the neck is spiral like a screw-thread, so that in rotating the clamp it compresses the cap upon the rim, andA the shoulders run out, or an opening is left at appropriate points or opposite sides of the neck for the adjustment of the clamp.

Having thus fully described my invention, what I claim is the following:

The peculiar form of the neck ot' the jar from the spiral shoulders gradually contracting to the top, as herein shown and described.

ROBERT HEMINGRAY.

j Witnesses:

W. H. BLYMYER, D. L. REID. 

